)]}'
{
  "log": [
    {
      "commit": "d9786b0e5be23ea0258405165098b4216579209c",
      "tree": "88641c107d29d0848ce8219652b8d0b1cdd3755c",
      "parents": [
        "57bee8dc2206404164606d4f5cabde272505f5fa"
      ],
      "author": {
        "name": "Artem Udovichenko",
        "email": "artem.u@samsung.com",
        "time": "Wed Oct 14 16:36:55 2015 +0300"
      },
      "committer": {
        "name": "Mathieu Chartier",
        "email": "mathieuc@google.com",
        "time": "Thu Oct 29 09:38:06 2015 -0700"
      },
      "message": "Implementation of fast lookup table to search class_def by descriptor\n\nLookup table is a hash table which built at compile time and stored\ninto oat file. At runtime the table is restored and used in the\nmethod DexFile::FindClassDef(const char*) to perform fast search of\nthe class_def_idx by class descriptor. Advantages of the lookup table\nover the HashSet (runtime/base/hash_set.h) are:\n1. Lookup table is built at compile time and uses read-only memory at\nruntime\n2. Lookup table uses less memory then DexFile::Index (less by 80% for\n/system/framework/framework.jar on Nexus5)\n3. Lookup table does less string comparisons compared with HashSet\n(less by 70% for zygote process on Nexus5)\nThe disadvantage of the lookup table is it increased boot.oat size by\n0.2% on Nexus5 and application .oat file by 0.3% in average on Nexus5.\n\nmathieuc changes:\nCreate lookup table in dex2oat to speed up compilation. Clean up code\nto follow style guide and use less static functions. Added\nperformance measurements.\n\nCompile ~100 APKs 5 times with filter interpret-only:\nBefore:\nreal  1m8.989s\nuser  0m59.318s\nsys 0m7.773s\n\nAfter:\nreal  1m1.493s\nuser  0m52.055s\nsys 0m7.581s\n\nApp launch (AOSP N5 maps, average of 45 runs):\nBefore: 966.84ms\nAfter: 923.733ms\nLaunch speedup is 4.7%\n\nMemory usage compared to HashSet index on 50 various APK:\n32 bit: HashSet ~625694b vs TypeLookupTable ~404268b\n64 bit: HashSet ~1251390b vs TypeLookupTable ~404268b\n\nBug: 10921004\nBug: 20269715\n\nChange-Id: I7246c1d9ad9fe81fe5c5907a4bf70396d8f9242a\n"
    }
  ]
}